W124 Rear Head Rests Won't Stay

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PinHooi Tee - 03 Aug 2005 16:23 GMT

I own a1993 300E-2.8 and recently the rear head rests just won't stay up.
When the ignition is off, I am able to pull the head rests to stay up.
Whenever I turn on the ignition key before cranking, the head rests will
fall back automatically. With the ignition on, I can never make the head
rests to stay up. They just keep falling back.

I have check the head rest switch at the control console and there is
nothing wrong with it. Even with the switch pulled out, the above funny
thing still happens. Anyone got any idea on which part has gone wrong?

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PinHooi Tee - 03 Aug 2005 17:46 GMT

I am sorry, in fact the head rests retracted (fall back) only when the
engine starts.

>I own a1993 300E-2.8 and recently the rear head rests just won't stay up.
>When the ignition is off, I am able to pull the head rests to stay up.
[quoted text clipped - 5 lines]
> nothing wrong with it. Even with the switch pulled out, the above funny
> thing still happens. Anyone got any idea on which part has gone wrong?

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ws - 04 Aug 2005 04:33 GMT

> I am sorry, in fact the head rests retracted (fall back) only when the
> engine starts.
[quoted text clipped - 8 lines]
>>nothing wrong with it. Even with the switch pulled out, the above funny
>>thing still happens. Anyone got any idea on which part has gone wrong?

AFAIK, The headrest restraints are vacuum driven. Check the vacuum
solenoid valve, it is probably stuck open. (Can't remember the location,
must look at my car later)

Regards,
WS

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